Theoretical and experimental study on nonlinear effects of mode-locked and extracavity modulation nanosecond pulsed laser

Shun Li; Pingxue Li; Min Yang; Kaixuan Wang; Wenhao Xiong; Chuanfei Yao

doi:10.1117/12.2533712

17 May 2019 Theoretical and experimental study on nonlinear effects of mode-locked and extracavity modulation nanosecond pulsed laser

Shun Li, Pingxue Li, Min Yang, Kaixuan Wang, Wenhao Xiong, Chuanfei Yao

Author Affiliations +

Proceedings Volume 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019); 111702G (2019) https://doi.org/10.1117/12.2533712
Event: Fourteenth National Conference on Laser Technology and Optoelectronics, 2019, Shanghai, China

Abstract

Through simulation calculations and experiments, the two popular methods of generating nanosecond (ns) pulsed laser were studied respectively. A new method for generating a ns pulsed laser with high power and ultra-high repetition frequency by using dispersive fiber after SESAM mode-locked oscillator was proposed. In the simulation calculation of the mode-locked ns pulsed laser, the time-frequency evolution characteristics of the laser formation process were analyzed. The variation process of the stimulated Raman scattering (SRS) effect was obtained at different injection powers. In the simulation calculation of the extracavity modulation ns pulsed laser, the threshold of the stimulated Brillouin scattering (SBS) effect was obtained in the 4-stage fiber amplification experiment. Then, the nonlinear dynamics model of the ns pulsed fiber laser was established by considering various nonlinear effects. The results showed the theoretical models were consistent with the experimental investigations. This provided a new way to further optimize the parameter of ns pulsed fiber lasers and also contribute to solve nonlinear damage problems in such lasers.

Citation Download Citation

Shun Li, Pingxue Li, Min Yang, Kaixuan Wang, Wenhao Xiong, and Chuanfei Yao "Theoretical and experimental study on nonlinear effects of mode-locked and extracavity modulation nanosecond pulsed laser", Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111702G (17 May 2019); https://doi.org/10.1117/12.2533712

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KEYWORDS

Pulsed laser operation

Fiber lasers

Mode locking

Modulation

Laser scattering

Optical simulations

Laser applications

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